US3828576A - Combined boiler and heat exchanger for an absorption refrigeration unit operating on indifferent gas - Google Patents

Combined boiler and heat exchanger for an absorption refrigeration unit operating on indifferent gas Download PDF

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Publication number
US3828576A
US3828576A US00350786A US35078673A US3828576A US 3828576 A US3828576 A US 3828576A US 00350786 A US00350786 A US 00350786A US 35078673 A US35078673 A US 35078673A US 3828576 A US3828576 A US 3828576A
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United States
Prior art keywords
boiler
pump
heat
vapour
heat exchanger
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Expired - Lifetime
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US00350786A
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English (en)
Inventor
Hakon Eidet
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PETTERSENS K SONNER
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PETTERSENS K SONNER
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B33/00—Boilers; Analysers; Rectifiers

Definitions

  • a circulation pump transports vapour admixed with liquid to a stand pipe in a vapour tube
  • vapour through the vapour tube and a rectifier outside the boiler to the condenser of the unit.
  • the invention relates to a combined boiler and heat exchanger for an absorption refrigeration unit operating with indifferent gas, where the vapour admixed with liquid, transported by the circulation pump of the unit, is passed to a stand pipe which is arranged within the vapour tube of the unit.
  • thermosyphonpump of the unit being also heat conductively connected to the chimney located outside the boiler.
  • thermo-syphon pump mounted in the unit.
  • ammonia NH In absorption units operating with indifferent gas, ammonia NH; is in general used as cooling medium. Ammonia has a relatively low boiling point and is extremely volatile.
  • the basic teaching of the invention is that the unit parts which must operate at elevated temperatures should be disposed within the apparatus parts operating at lower temperatures, so that heat exchange may b utilized.
  • the boiler is formed from the stand pipe of the unit, i.e., the pipe which forms the column which forces the weak solution back to the absorber.
  • the purpose of the invention is to eliminate this disadvantage, in that a transference of the excess heat from the boiled, weak absorption solution, and the heat to the boiler liberated by rectification of the vapour, expels volatile cooling medium of a rich absorption solution so that the concentration of the solution is substantially reduced before it is passed to the thermosyphon pump for further boiling and transport to the stand pipe of the unit; y
  • this is achieved in that the lower part of the vapour tube forms the boiler, and the supply chamber of the pump where the vapours flowing to the condenser of the unit are forced over to a rectifier located outside the boiler by means of the heat in the vapour from the pump, by the excess heat from the weak-solution in the stand pipe and by the heat from direct communication between the boiler and the primary heating source via the chimney.
  • the result is a stabilizing of the pump action which gives optimum exchange and final boiling prior to the solution being conveyed to the vapour separating chamber (the stand pipe) where the weak solution, via the stand pipe, is conveyed to the absorber of the unit and where the rich ammonia vapour, via the vapour tube, is passed through the boiler, the rectifier and the dephlegmator to the condenser of the unit.
  • a relatively large amount of the cooling medium necessary in the evaporator may thereby be conveyed past the pump and boiler of the unit, and thus not unnecessarily load the functions thereof.
  • FIG. 1 illustrated in diagram an absorption refrigeration unit having a combined boiler and heat exchanger in accordance with the invention.
  • FIG. 2 illustrates in longitudinal section a combined boiler and heat exchanger according to the invention.
  • FIG. 3 is a section along the line 33 in FIG. 2.
  • a combined heating source consisting of a gas burner 20 and an electric heating element 21 which may be used independently; however, the unit is usually provided with only one heating source.
  • the heating source transfers its heat to the chimney 5 which is directly connected in heat-conducting manner to the thermo-syphon pump 1 and to the boiler 6 along a common generatrix.
  • the pump 1 conveys the solution up from the bottom of the boiler 6 through a tube piece 11 and out through an opening 17 into the stand pipe 2 and maintains here a liquid column of weak solution up to the level indicated by 13, which is sufficiently high to permit the weak solution of itself to run into the stand pipe 2 through the boiler 6 and the outer tube 9, FIG. 1, of the heat exchanger and into the absorber 19 at 12.
  • the part of the chimney (the heat distributing tube) 5 and the boiler 6, which transfer heat to the circulation pump 1 has an optimal length and is disposed such with respect to a level 18, at which the liquid in the pump 1 is in communication with the liquid level in the rectifier 4 and the absorption container 14 (FIG. 1), that it is possible by minimum supply of heat to maintain a sufficiently high temperature for a stable exchange in the pump.
  • vapour bubbles are formed which cause a mixture of cooling medium and absorption liquid to rise and pass into the stand pipe 2.
  • the vapour of the cooling medium then rises through the upper part of the stand pipe, the vapour separating chamber 9 and, via the vapour tube 3, is conveyed downwards to the boiler 6 and further, via the tube 7, into the rectifier 4 and up through the dephlegmator 10 to the condenser 16, the heavy, weak solution sinking in the stand pipe 2
  • the stand pipe 2 is passed through the boiler 6 and the supply chamber to the pump, so that the excess heat from the weak solution benefits both boiler and pump.
  • the assembly of certain parts of the refrigeration unit in accordance with the invention has made it possible to utilize to a substantial degree the heat from parts which operate at elevated temperature.
  • a combined boiler and heat exchanger for an absorption refrigeration unit comprising a thermo-siphon pump and a vapor tube and a chimney disposed upright and in direct heat exchange with each other, means to heat the chimney, a standpipe disposed within the vapor tube, the lower end of the thermo-siphon pump communicating with the vapor tube outside the standpipe and the upper end of the thermo-siphon pump communicating with the inside of the standpipe, and a rectifier disposed outside the vapor tube but communicating with the vapor tube at the level of liquid in the vapor tube so that vapors are forced through the rectifier by means of heat in the vapor from the pump and by excess heat from liquid in the standpipe and by direct heat exchange between the vapor tube and the

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)
US00350786A 1972-04-20 1973-04-13 Combined boiler and heat exchanger for an absorption refrigeration unit operating on indifferent gas Expired - Lifetime US3828576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO1392/72A NO130203C (enrdf_load_stackoverflow) 1972-04-20 1972-04-20

Publications (1)

Publication Number Publication Date
US3828576A true US3828576A (en) 1974-08-13

Family

ID=19878176

Family Applications (1)

Application Number Title Priority Date Filing Date
US00350786A Expired - Lifetime US3828576A (en) 1972-04-20 1973-04-13 Combined boiler and heat exchanger for an absorption refrigeration unit operating on indifferent gas

Country Status (7)

Country Link
US (1) US3828576A (enrdf_load_stackoverflow)
AU (1) AU5459373A (enrdf_load_stackoverflow)
DE (1) DE2318237A1 (enrdf_load_stackoverflow)
FR (1) FR2180906B3 (enrdf_load_stackoverflow)
IT (1) IT983915B (enrdf_load_stackoverflow)
NO (1) NO130203C (enrdf_load_stackoverflow)
ZA (1) ZA732663B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660049A (en) * 1995-11-13 1997-08-26 Erickson; Donald C. Sorber with multiple cocurrent pressure equalized upflows
US20030066307A1 (en) * 2001-10-09 2003-04-10 Indel B S.P.A Absorption-cycle refrigerating unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19516630C2 (de) * 1995-05-05 1998-09-24 Electrolux Siegen Gmbh Verfahren zum Betreiben eines Absorptionskühlaggregates sowie Absorptionskühlaggregat

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402414A (en) * 1941-08-27 1946-06-18 Kogel Wilhelm Georg Refrigeration
US3080729A (en) * 1960-01-30 1963-03-12 Electrolux Ab Absorption refrigeration
US3130564A (en) * 1959-06-04 1964-04-28 Electrolux Ab Absorption refrigeration
US3338062A (en) * 1964-12-11 1967-08-29 Electrolux Ab Absorption refrigeration system of the inert gas type
US3678699A (en) * 1969-09-29 1972-07-25 Electrolux Ab Absorption

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2402414A (en) * 1941-08-27 1946-06-18 Kogel Wilhelm Georg Refrigeration
US3130564A (en) * 1959-06-04 1964-04-28 Electrolux Ab Absorption refrigeration
US3080729A (en) * 1960-01-30 1963-03-12 Electrolux Ab Absorption refrigeration
US3338062A (en) * 1964-12-11 1967-08-29 Electrolux Ab Absorption refrigeration system of the inert gas type
US3678699A (en) * 1969-09-29 1972-07-25 Electrolux Ab Absorption

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660049A (en) * 1995-11-13 1997-08-26 Erickson; Donald C. Sorber with multiple cocurrent pressure equalized upflows
US20030066307A1 (en) * 2001-10-09 2003-04-10 Indel B S.P.A Absorption-cycle refrigerating unit

Also Published As

Publication number Publication date
DE2318237A1 (de) 1973-10-25
FR2180906A1 (enrdf_load_stackoverflow) 1973-11-30
IT983915B (it) 1974-11-11
NO130203B (enrdf_load_stackoverflow) 1974-07-22
AU5459373A (en) 1974-10-17
ZA732663B (en) 1974-04-24
FR2180906B3 (enrdf_load_stackoverflow) 1976-04-02
NO130203C (enrdf_load_stackoverflow) 1976-02-03

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